Don'tcome___youareinvitedA.unlessB.

发布时间:2020-07-17 04:28:13

Don't e ___ you are invitedA.unlessB.if notC.whyD.that

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A解析unless可相当于if not,但用于句中时,不可说:if not you are invited ,可以说if you aren't invited,所以选unless。
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